Add Accessing Location Within @reach/router as a react til

react/accessing-location-within-reach-router.md

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+# Accessing Location Within @reach/router
+
+The API of [`@reach/router`](https://reach.tech/router) departs a bit from
+[`react-router`](https://reacttraining.com/react-router/) in a couple ways.
+The `location` prop which you may be used to having access to automatically
+is instead available through the
+[`Location`](https://reach.tech/router/api/Location) component.
+
+```react
+import React from 'react';
+import { Location } from '@reach/router';
+
+const MyComponent = () => {
+  return (
+    <Location>
+      {({ location }) => {
+        return <p>Current Location: {location.pathname}</p>;
+      }}
+    </Location>
+  );
+}
+```
+
+This is a contrived example, but you can imagine how you'd use it to access
+`state` or even create an HOC similar to `withRouter`.